FOOD 121 



in beans is more economical for use. Protein in meat 

 costs from three to five times as much as the same 

 amount of protein in beans. 



80. Water and Mineral Foods. The unorganized or 

 mineral foods include water, common salt, calcium, and 

 iron compounds. These are eaten in large quantities 

 with the nutrients. Water is often taken separately, 

 during meal time and between meals. The body is 

 about 65 per cent water. What is the weight of the 

 water in the body of a person who weighs 150 Ibs? About 

 75 per cent of the beef on the market is water; 90 per 

 cent of blood is water. 



Use of Water. Water is used in the body to carry 

 food to all parts and to every cell. What is the name of 

 the liquid in the body that carries the food? Water is 

 used to liquefy the foods for digestion, so that they can 

 pass through the walls of the digestive organs into the 

 blood. Water keeps the body in a flexible condition so 

 that it does not become stiff and rigid like dried beef. 

 The water in the muscles permits them to contract and 

 change their shape, and thus enables the whole body to 

 move about. Unless a large percentage of the body 

 were water we could not move about and be active in 

 our work. About three quarts of water should be taken 

 daily by each adult. These three quarts include the 

 water which is taken separately and that which is in the 

 foods when eaten. 



The minerals in foods are used to form the framework 

 of the body, such as bone and connective tissue, which 

 give shape to the body and hold the cells in place. Lime 

 and phosphorus help to form bone. 



81. Tests for Nutrients. Foods can be tested for 

 carbohydrates by placing on them a few drops of dilute 



